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Flow Chart of Troubleshooting
7-2
SIM_RST
SIM_IO
SIM_CLK
SIM_VCC
C407
R401
C414
+VDD_IO_LOW_1V8
C417
+VCC_SYN_2V8
C412
G
9
10
G
1
2
2
33
4 4
5
5
6 6
G
7
8
G
SIM400
1
C421
C418
C411
VBAT
OSC400
2
3
4
1
+VDD_IO_LOW_1V8
T400
R402
C413
+VDD_BT_1V8
+VDD_SD_2V9
+VDD_IO_HIGH_2V9
C419
C424
V
S
A
V
E
10
_
IR
Q
27
_
O
N
K
E
Y
1
_
R
E
C
1
13 _REC2
11
_
R
S
T
H
C
44
_SIMRSCD
7
_
S
IM
R
S
H
C
+VDD_RX_TX_2V8
SIMD3VBAT
45
SIMEN
42
SIMIOCD
9
S
IM
IO
H
C
41
SIMVCC
31
V
B
A
T
32
V
C
H
G
29
V
IN
T
30
24
RF2VDD
2
S
C
L
38
SCN
37
SCP
3
S
D
A
43
SIMCKCD
8
S
IM
C
K
H
C
40
NC
NC 54
26
O
S
C
I
25
O
S
C
O
6
P
W
R
E
N
1
5
P
W
R
E
N
2
28
R
E
F
C
23
RF12VBAT
RF1VDD
22
GPO3
HCVBAT
18
17
HCVDD
15
IOD2VBAT
IOVDD
14
LPD1VBAT
20
19
LPVDD
12
M
IC
B
IA
S
53
39
D3VDD
49
GND
GND 50
51
GND
GND 52
48
GPO1
47
GPO2
46
34
C
H
G
C
U
R
/B
A
T
M
A
X
33
C
H
G
D
R
V
4
C
L
K
3
2
K
36
C
P
V
B
A
T
35
C
P
V
D
D
21
D1VDD
D2VDD
16
U400
C409
V400
RB414II06N
BAT400
C408
C423
C415
L402
R403
C426
C416
+VDD_CAM_2V8
R404
C427
C420
C425
LCD_BL_ON
BACKLIGHT
AUX_ON
RSTON
SIMRST
32KHz_DIGIT
MIC_BIAS_2V1
REF_ON
PON_TX
SCL
SDA
SIMCLK
SIMIO
IT_PMU
ONKEYN